Tsubaki

Tsubaki is the main antagonist at the beginning of the story. He is the 8th Servamp who should originally not exist - that may be the reason the other Servamps did not know of him at the beginning. He is also called "Who is coming?" He often laughs for no reason just to find it boring a few seconds later. When he is in animal form, he has the shape of a two-tailed fox.

In contrary to the subclass of the other Servamps - his subclass can face the sunlight and are often good fighters.

Appearance
Tsubaki has short black hair, red eyes, and wearing sun glasses. He wears black coloured yukata with red camellia flower patterns on the sode (the loose arm part of yukata) and red obi that ties the yukata around his waist. He also wears white haori (Japanese traditional jacket) with the same red camellia pattern and a pair of geta (Japanese traditional wooden sandals).

Personality
Tsubaki has a strange sense of humour, often laughing at the simplest thing only to find it boring a few seconds later. He claims to hate humans and his vampire siblings, seeking to start vampire-human war. When it comes about fulfilling his goal, he is merciless and has no hesitation to kill innocent humans because he doesn't like them, simply stating that it's fair.

Beneath this trait, he can feel compassion or at least empathy for those in a situation similar to his own, whether they are human or vampire. One of such example is when he saved Sakuya and made him his subclass despite being a human. He cares greatly for all of his subclasses, crying for them when they died, and this also enraged him enough to personally capture Lawless after he killed his subclasses.

Background
When he was born exactly is unknown, but he is in fact the youngest of the Servamps. He seems to have a close relationship with the creator of Servamps that he refers as "Sensei" (meaning teacher or master). One night, he witnessed Sleepy Ash in his black lion form after he killed their creator, and Tsubaki seemed devastated at his creator's death. Since then, he has been looking for the real identity of the black lion to question why he killed their creator.

Hundreds of years later, he was once owned by C3 - the organization which is said to work for the coexistence of humans and vampires. According to Tsuyuki Shuhei, Tsubaki has fled C3 and then turned against them.

Some years prior to the storyline he finds the young Sakuya Watanuki who has just lost his sister through suicide his parents forced her into to get money from their insurance. Tsubaki gets, how guilty Sakuya feels because he lied to the police - he considers himself responsible for her death. Probably knowing about the future, Tsubaki promises Sakuya, that he will come and pick him up if "everything" is over. And when Sakuya is also forced into suicide by his parents, Tsubaki saved him by turning him into his subclass.

First Encounter
He is first mentioned by Belkia while fighting Sleepy Ash, now goes by the name Kuro and Mahiru. He then appears the next day, confronting Mahiru and Kuro, and explaines his plans and goals for the future: killing a lot of humans and all of his brothers because they don't know him. He talks to Kuro and asks him, if he would deny, that this world is boring and nothing ever happens. He declares war to his brother - but Kuro thinks Tsubaki might mistakes him for someone else because he does not know about a brother called Tsubaki. Hearing these words Tsubaki falls into laughter about how none of his brothers didn't know about him as he introduces himself as his youngest brother and the eighth Servamp of Melancholy.

He then directs his attention to Mahiru, telling him that it doesn't matter what happens as long as it's interesting to him. He continues saying that no one knowns him and nobody in the world understand his feelings, to which Mahiru points out that Tsubaki is simply lonely and nothing interests him because he doesn't face his own feelings. Tsubaki confirms this and that's why he wants to start a war. In attempt to stop Tsubaki, Mahiru tries to give him a name, prompting Tsubaki to try to kill Mahiru before he could done so, but the Servamp of Lust, All of Love, now known as Snow Lily, interferes using his illusion, saving Mahiru and Kuro.

Battle Against Sakuya and Belkia
He appears with Belkia again, eating at a sushi shop and welcomes Sakuya who just killed a subclass. They plan their next move to lure Mahiru and Kuro into a trap, which they succeeded. He appears beside one of his subclasses, Otogiri, watching Kuro starts to lose control and looking forward what will happen. However, he soon changed his mind and leaves. He then meets Mahiru again by a coincidence in a sushi bar where Mahiru's uncle is working and Mahirus uses this opportunity to ask how Sakuya became his subclass. Tsubaki reveals Sakuya's background and mocks Mahiru how he doesn't understand Sakuya despite being his friend. Sensing Kuro's murderous intent and not wanting to fight now, Tsubaki takes his leave.

C3 Bombings
He is seen playing mahjong with his subclasses, Belkia, Otogiri, and Shamrock. While playing, Shamrock asks why Tsubaki hasn't dispose of Sakuya who may betray him soon, but Tsubaki simply change the subject to their next plan, deciding to serve some "fireworks" and take everything back since "Sensei" is tired of waiting as well. It turns out that Tsubaki orders his subclasses to bomb places that involves C3, some of them are Mahiru's school and a place where summer festival is being held which Tetsu Sendagaya, the eve of Servamp of Pride, able to stop.

Attack at Alicein Mansion
Sometimes afterwards, he sends Otogiri to sneak into the mansion of the Aliceins to take down Lily. Otogiri succeeds in destroying the contract item that causes Lily to lose his power, and then receives call from Tsubaki just as she bumps into Mahiru and Kuro. He asks Otogiri to give the phone to Mahiru so he can talk to him, so Otogiri put on a speaker. Tsubaki explains that by destroying the item that constitute the contract between servamps and eves, the servamp's body will regurgitate the djinn. Tsubaki reveals he intends to repeat the same process to his remaining siblings to fill the world with djinns and he feels he is getting closer to his goal before turning off the phone.

Capturing Lawless and Licht
Using a trap, he lures Licht Jekylland Todoroki, the eve of Servamp of Greed, Lawless, to Japan under pretext to hold a piano concert. In reality, Tsubaki plans to defeat Lawless and Licht as he orders many of his subclasses to be audience of Licht's concert. But things doesn't work the way Tsubaki had planned and instead of Lawless beeing defeated, it's Tsubakis subclass who were nearly erased completely. Deeply shocked and hurt, Tsubaki personally confronts Lawless and captures him, while his strongest subclass, Higan, captures Licht.

Shortly after Higan captures Licht, Tsubaki calls Higan's cell phone that he had dropped and to his surprise, the one who answered is Misono who picked the cell phone by a chance. Mission reveals that one of his subclasses that has survived from Lawless' attack, Lilac, is in their custody, so he demands Tsubaki to trade the Greed pair with Lilac. Tsubaki agrees he won't harm the pair further, but bluffs that he won't let them stay together, convincing Misono and the others that Tsubaki is placing the pair in separate locations beyond the allowed distance between eve and servamp, which will result in Licht's death. Despite agreeing to the trade, Tsubaki visits Mahiru, Misono, and Tetsu to look for his Lilac, but finds that none of them are with Lilac. He then receives call from Misono who tells him the place for the trade, and Tsubaki decides to go alone, assuring his subclasses that even if he is being betrayed, he will betray no one.

At the promised place, he is shocked to be confronted by Lawless' subclasses who all wears whale costumes and demands Tsubaki to return their servamp and eve. He was thinking of settling things by switching with the keys to Lawless and Licht's rooms and asks where his subclass is. Guilderstern tells him that Lilac is inside one of their costumes as they all attacks him. Tsubaki tries to attack back, but then realises that he will risk injuring his subclass if he attack carelessly and the costumes are thick that it's hard to which costume that holds Lilac. Despite knowing they're buying times, Tsubaki decides to play along with their plan as long as there's a possibility that his subclass is there.

While doing so, Tsubaki saw Kuro in his black lion form arriving at the tower with Mahiru. Recognising the black lion as the one that killed his creator hundreds of years before, Tsubaki smiles wickedly. Belkia then sends Servamp of Pride, Old Child, to Tsubaki's location, and succeeded Tsubaki in defeating him. He quickly goes back to the tower, taking Lawless' contract item that Lilac took. He tells Tetsu of Old Child's fate and now plans to do the same to Lawless, slicing Lawless' necklace that causes the djinns the came out from his body.

He then confronts Kuro, asks does he now believes his claim to be the eighth servamp and reveals he has been looking for him ever since he first saw him in his black lion form after he killed their creator. Kuro tries to reach Tsubaki by speaking with him, to which Tsubaki points out that he didn't speak properly first with their creator and then killed him just like that, so Kuro should do the same now, something that Kuro replies he will regret if he does. Tsubaki then asks why Kuro killed their creator. When hearing that Kuro killed him because his research is too dangerous, he reveals that C3 are continuing that research. He also laments at the fact that his creator never talks about him at all to his siblings.

Before the conversation can go further, C3 magicians Tsurugi Kamiya, Junichirou Kurumamori and Yumikage Tsukimitsu, appears and corners Tsubaki. When he is nearly defeated, Higan uses his flames to protect him as he tells Tsubaki to escape with Lilac. Tsubaki protests that there's no way he and the other subclasses can follow him, but Higan simply tells him to go and reminds him of his own words that he won't betray anyone. Reluctantly, Tsubaki escape with Lilac. A few days after the incident, Tsubaki tells Lilac to tell all of his subclasses to forget about him and live freely, and after that the rest is his own problem.

Trivia

 * His favourite food is Inari-Sushi and everything with Macha flavour (Japanese Green Tea)
 * He doesn't like his siblings and hearing about other people's dreams.
 * He likes long walks.
 * His favorite color is red.
 * He can hold his liquor well, but will get drunk easily on wine
 * He is very sensitive about his height
 * His seiyuu (Tatsuhisa Suzuki) is the lead singer of OLDCODEX, the band who sings the opening theme of the anime, Deal With.
 * In the first popularity poll he came sixth with 1570 votes.

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